package test;
import java.util.*;
public class lianxi14 {
public static void main(String[] args) {
     int year, month, day;
     int days = 0;
     int d = 0;
     int e;
     input fymd = new input();
     do {
     e = 0;
     System.out.print("输入年：");
     year =fymd.input();
     System.out.print("输入月：");
     month = fymd.input();
     System.out.print("输入天：");
     day = fymd.input();
     if (year < 0 || month < 0 || month > 12 || day < 0 || day > 31) {
     System.out.println("输入错误，请重新输入！");
     e=1 ; 
     }
     }while( e==1);
      for (int i=1; i <month; i++) {
      switch (i) {
      case 1:
      case 3:
      case 5:
      case 7:
      case 8:
      case 10:
      case 12:
       days = 31;
      break;
      case 4:
      case 6:
      case 9:
      case 11:
       days = 30;
      break;
      case 2:
       if ((year % 400 == 0) || (year % 4 == 0 && year % 100 != 0)) {
        days = 29;
       } else {
        days = 28;
       }
       break;
      }
      d += days;
      }
     System.out.println(year + "-" + month + "-" + day + "是这年的第" + (d+day) + "天。");
}
}
class input{
public int input() {
     int value = 0;
     Scanner s = new Scanner(System.in);
     value = s.nextInt();
     return value;
}
}
